/**
 * 通用js方法封装处理
 * Copyright (c) 2019 exencell
 */
import {ElLoading, ElMessage} from "element-plus";
import {Base64} from "js-base64";


// 日期格式化
export function parseTime(time, pattern) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    } else if (typeof time === 'string') {
      time = time.replace(new RegExp(/-/gm), '/').replace('T', ' ').replace(new RegExp(/\.[\d]{3}/gm), '');
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

// 添加日期范围
export function addDateRange(params, dateRange, propName) {
  let search = params;
  search.params = typeof (search.params) === 'object' && search.params !== null && !Array.isArray(search.params) ? search.params : {};
  dateRange = Array.isArray(dateRange) ? dateRange : [];
  if (typeof (propName) === 'undefined') {
    search.params['beginTime'] = dateRange[0];
    search.params['endTime'] = dateRange[1];
  } else {
    search.params['begin' + propName] = dateRange[0];
    search.params['end' + propName] = dateRange[1];
  }
  return search;
}

// 回显数据字典
export function selectDictLabel(datas, value) {
  if (value === undefined) {
    return "";
  }
  var actions = [];
  Object.keys(datas).some((key) => {
    if (datas[key].value == ('' + value)) {
      actions.push(datas[key].label);
      return true;
    }
  })
  if (actions.length === 0) {
    actions.push(value);
  }
  return actions.join('');
}

// 回显数据字典（字符串数组）
export function selectDictLabels(datas, value, separator) {
  if (value === undefined || value.length ===0) {
    return "";
  }
  if (Array.isArray(value)) {
    value = value.join(",");
  }
  var actions = [];
  var currentSeparator = undefined === separator ? "," : separator;
  var temp = value.split(currentSeparator);
  Object.keys(value.split(currentSeparator)).some((val) => {
    var match = false;
    Object.keys(datas).some((key) => {
      if (datas[key].value == ('' + temp[val])) {
        actions.push(datas[key].label + currentSeparator);
        match = true;
      }
    })
    if (!match) {
      actions.push(temp[val] + currentSeparator);
    }
  })
  return actions.join('').substring(0, actions.join('').length - 1);
}

// 字符串格式化(%s )
export function sprintf(str) {
  let args = arguments, flag = true, i = 1;
  str = str.replace(/%s/g, function () {
    let arg = args[i++];
    if (typeof arg === 'undefined') {
      flag = false;
      return '';
    }
    return arg;
  });
  return flag ? str : '';
}

// 转换字符串，undefined,null等转化为""
export function parseStrEmpty(str) {
  if (!str || str == "undefined" || str == "null") {
    return "";
  }
  return str;
}

// 数据合并
export function mergeRecursive(source, target) {
  for (var p in target) {
    try {
      if (target[p].constructor == Object) {
        source[p] = mergeRecursive(source[p], target[p]);
      } else {
        source[p] = target[p];
      }
    } catch (e) {
      source[p] = target[p];
    }
  }
  return source;
};

/**
 * 构造树型结构数据
 * @param {*} data 数据源
 * @param {*} id id字段 默认 'id'
 * @param {*} parentId 父节点字段 默认 'parentId'
 * @param {*} children 孩子节点字段 默认 'children'
 */
export function handleTree(data, id, parentId, children) {
  let config = {
    id: id || 'id',
    parentId: parentId || 'parentId',
    childrenList: children || 'children'
  };

  var childrenListMap = {};
  var nodeIds = {};
  var tree = [];

  for (let d of data) {
    let parentId = d[config.parentId];
    if (childrenListMap[parentId] == null) {
      childrenListMap[parentId] = [];
    }
    nodeIds[d[config.id]] = d;
    childrenListMap[parentId].push(d);
  }

  for (let d of data) {
    let parentId = d[config.parentId];
    if (nodeIds[parentId] == null) {
      tree.push(d);
    }
  }

  for (let t of tree) {
    adaptToChildrenList(t);
  }

  function adaptToChildrenList(o) {
    if (childrenListMap[o[config.id]] !== null) {
      o[config.childrenList] = childrenListMap[o[config.id]];
    }
    if (o[config.childrenList]) {
      for (let c of o[config.childrenList]) {
        adaptToChildrenList(c);
      }
    }
  }
  return tree;
}

/**
* 参数处理
* @param {*} params  参数
*/
export function tansParams(params) {
  let result = ''
  for (const propName of Object.keys(params)) {
    const value = params[propName];
    var part = encodeURIComponent(propName) + "=";
    if (value !== null && value !== "" && typeof (value) !== "undefined") {
      if (typeof value === 'object') {
        for (const key of Object.keys(value)) {
          if (value[key] !== null && value[key] !== "" && typeof (value[key]) !== 'undefined') {
            let params = propName + '[' + key + ']';
            var subPart = encodeURIComponent(params) + "=";
            result += subPart + encodeURIComponent(value[key]) + "&";
          }
        }
      } else {
        result += part + encodeURIComponent(value) + "&";
      }
    }
  }
  return result
}

// 返回项目路径
export function getNormalPath(p) {
  if (p.length === 0 || !p || p === 'undefined') {
    return p
  };
  let res = p.replace('//', '/')
  if (res[res.length - 1] === '/') {
    return res.slice(0, res.length - 1)
  }
  return res;
}

// 验证是否为blob格式
export function blobValidate(data) {
  return data.type !== 'application/json'
}

/** 只有二进制流文件下载
 * @param blob  二进制文件流
 */
export function downFileToLocal(blob) {
  let filename = prompt("请输入文件名？");
  const reg = /[\\\\/:*?\"<>|]/img
  const aMatch = filename.match(reg)
  // 文件名不能为空
  if(filename === "") {
    ElMessage({ message: "文件名不能为空", type: "error" })
  } else if(filename.startsWith('.')) {     // 使用 startsWith 检测字符是否以 . 开头
    ElMessage({message: "文件名不能以.开始", type: "error"})
  } else if(aMatch) {
    let aLimit = [...new Set(aMatch)]
    ElMessage({message: `不能输入 ${aLimit .join(' ')} 特殊字符`, type: "error"})
  } else {
    // 创建用于下载文件的a标签
    const link = document.createElement('a')
    // 设置下载内容
    link.href = window.URL.createObjectURL(blob)
    // 设置下载文件的名字
    link.setAttribute('download', filename)
    // 界面上隐藏该按钮
    link.style.display = 'none'
    // 放到页面上
    document.body.appendChild(link)
    // 点击下载文件
    link.click()
    // 从页面移除掉
    document.body.removeChild(link)
    // 释放 URL.createObjectURL() 创建的 URL 对象
    window.URL.revokeObjectURL(link.href)
  }
}

/**
 * response里header里带文件名下载
 * @param response 响应的全部内容
 * @returns {null} 报错返回对象，二进制文件流返回null
 */
export function downloadFile(response) {
  if(response.data.type === 'application/json') {
    const reader = new FileReader();
    reader.readAsText(response.data)
    reader.onload = function(){
      console.log(reader.result)
      const  { msg }  = JSON.parse(reader.result);
      ElMessage({message: msg, type: 'error'})
    }
  } else {
    let fileName = response.headers['content-disposition']
    // 获取文件名
    if (fileName && fileName.length >= 2) {
      fileName = fileName.split('=')[1]
    }
    fileName = decodeURIComponent(fileName)

    let url = window.URL.createObjectURL(new Blob([response.data]))
    let link = document.createElement('a')
    link.style.display = 'none'
    link.href = url
    link.setAttribute('download', fileName)
    document.body.appendChild(link)
    link.click()
    // 从页面移除掉
    document.body.removeChild(link)
    // 释放 URL.createObjectURL() 创建的 URL 对象
    window.URL.revokeObjectURL(link.href)
  }
}

// 表单重置
export function resetForm(element) {
  if(element) {
    if(typeof element === 'string') {
      if (this.$refs[element]) {
        this.$refs[element].resetFields();
      }
    } else {
      element.resetFields()
    }
  } else {
    return false
  }
}

// 验证文件是否为图片
export function imgValidate(imgFile) {
  return imgFile.type.substring(0,5) === 'image'
}

/**
 * @param sel  css选择器
 * @param text 加载是显示的文本
 */
export function Loading(sel='body', text='加载中, 请稍后...') {
  return ElLoading.service({
    target: sel,
    text: text,
    background: 'rgba(0, 0, 0, 0.7)',
  })
}

export function Encoding() {
  ElMessage({ message: "该功能正在实现中 ...", type: "warning" })
}

/**
 *  将对象数组里的某一个值，转换为单一值数组
 * @param array 需要转换的对象数组
 * @param key   string 需要拉出来的key值
 * @returns {*[]}
 */
export function shiftArrayFormat(array, key) {
  console.log(array, key)
  const tmpArr = []
  if(array instanceof Array) {
    for(let i=0; i<array.length; i++) {
      tmpArr.push(array[i][key])
    }
  } else {
    ElMessage({ message: "传递值为非数组", type: "error" })
  }
  return tmpArr
}

/**
 * 前端静态文件下载,文件必须放在public/file/ 目录下
 * @param filename 下载的文件名
 */
export function downloadStaticFile(filename) {
  const link = document.createElement('a')
  link.href = `/file/${filename}`
  link.setAttribute('download', filename)
  link.style.display = 'none'
  document.body.appendChild(link)
  link.click()
  document.body.removeChild(link)
  window.URL.revokeObjectURL(link.href)
}

/**
 * 文件在线预览服务
 * @param url 文件的url地址
 */
export function filePreview(url) {
  window.open('http://110.186.51.162:8012/onlinePreview?url='
    + Base64.encode(encodeURI(url)));
}